arthritic vs rheumy

arthritic is a noun but rheumy is not a noun.

Word	Noun	Adjective	Verb	Adverb
arthritic	Yes	Yes	No	No
rheumy	No	Yes	No	No

As adjectives, arthritic and rheumy are synonyms defined as:

Other synonyms of arthritic include creaky, rheumatic, rheumatoid.

arthritic (noun)	rheumy (noun)
a person afflicted with arthritis

arthritic (adjective)	rheumy (adjective)
of or pertaining to arthritis	of or pertaining to arthritis
	moist, damp, wet (especially of air)